66414063898 has 64 divisors (see below), whose sum is σ = 126728404992. Its totient is φ = 25393487040.

The previous prime is 66414063851. The next prime is 66414063913. The reversal of 66414063898 is 89836041466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4636215 + ... + 4650517.

It is an arithmetic number, because the mean of its divisors is an integer number (1980131328).

Almost surely, 2^66414063898 is an apocalyptic number.

66414063898 is a deficient number, since it is larger than the sum of its proper divisors (60314341094).

66414063898 is a wasteful number, since it uses less digits than its factorization.

66414063898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15179.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 66414063898 in words is "sixty-six billion, four hundred fourteen million, sixty-three thousand, eight hundred ninety-eight".